Bulk actions in the content list (publish / set to draft / move to trash)

[swissky]

Summary

Add bulk actions to the content list (Pages, Posts, and any collection): select multiple entries via row checkboxes (or a "select all on this page" header checkbox), then Publish, Set to draft, or Move to trash in one step.

Motivation

Today, status changes and trashing are strictly one row at a time. Editors managing many entries (content migrations, seasonal cleanup, batch publishing) routinely need to act on many at once — a common CMS expectation that the current list lacks.

Proposed design

• Admin-only, no backend/API changes: the bulk handlers run the existing per-entry endpoints (publishContent / unpublishContent / deleteContent) in parallel with Promise.allSettled, so one failure does not abort the batch.
• Opt-in & backward-compatible: the checkbox column and action toolbar only render when the parent wires the new onBulkPublish / onBulkUnpublish / onBulkDelete handlers.
• Selection persists across pagination and is pruned when rows leave the result set (filter/locale change, deletion).
• New strings are i18n-wrapped; trash uses a confirmation dialog.

Status

A focused implementation PR (@emdash-cms/admin, changeset included, typecheck/lint/format clean) is ready to link here. Happy to adjust scope or UX per maintainer feedback before merge.